.TH std::span::empty 3 "2024.06.10" "http://cppreference.com" "C++ Standard Libary"
.SH NAME
std::span::empty \- std::span::empty

.SH Synopsis
   [[nodiscard]] constexpr bool empty() const noexcept;  \fI(since C++20)\fP

   Checks if the span is empty.

.SH Parameters

   \fI(none)\fP

.SH Return value

   true if the span is empty (i.e., size() == 0); false otherwise.

.SH Example


// Run this code

 #include <iomanip>
 #include <iostream>
 #include <span>

 int main()
 {
     std::span<const char> span{"ABCDEF"};

     while (!span.empty())
     {
         std::cout << std::quoted(span.data()) << '\\n';
         span = span.last(span.size() - 1);
     }
 }

.SH Output:

 "ABCDEF"
 "BCDEF"
 "CDEF"
 "DEF"
 "EF"
 "F"
 ""

.SH See also

   size    returns the number of elements in the sequence
   (C++20) \fI(public member function)\fP
